diff options
Diffstat (limited to 'Master/texmf-dist/doc/latex/xifthen/xifthen.tex')
| -rw-r--r-- | Master/texmf-dist/doc/latex/xifthen/xifthen.tex | 509 |
1 files changed, 407 insertions, 102 deletions
diff --git a/Master/texmf-dist/doc/latex/xifthen/xifthen.tex b/Master/texmf-dist/doc/latex/xifthen/xifthen.tex index ee6549dff24..0dda3e6eab4 100644 --- a/Master/texmf-dist/doc/latex/xifthen/xifthen.tex +++ b/Master/texmf-dist/doc/latex/xifthen/xifthen.tex @@ -1,4 +1,3 @@ -% $Id: xifthen.tex,v 1.1.1.1 2006/03/25 01:24:34 noirel Exp $ \documentclass{article} \usepackage{etex} @@ -6,174 +5,480 @@ \usepackage[ascii]{inputenc} \usepackage[T1]{fontenc} \usepackage[warn]{textcomp} -\usepackage{fourier} - \renewcommand*{\sfdefault}{lmss} - \renewcommand*{\ttdefault}{lmtt} - \renewcommand*{\textcompsubstdefault}{lmr} -\usepackage{microtype} +\usepackage[a4paper, pdftex, margin=1.5in]{geometry} +\usepackage{lmodern} \usepackage{typetex} +\usepackage{microtype} +\usepackage{xcolor} +\usepackage{url} +\usepackage[bottom,hang]{footmisc} \usepackage[babel]{csquotes} \usepackage[british]{babel} +\usepackage{hyperref} + +\setcounter{secnumdepth}{-\maxdimen} \makeatletter +\newcommand*{\1}{$_1\m@th$} +\newcommand*{\2}{$_2\m@th$} + +% Borrowed from doc.sty +\newcommand*{\getfileinfo}[1]{% + \def \filename {#1}% + \def \@tempb ##1 ##2 ##3\relax ##4\relax {% + \def \filedate {##1}% + \def \fileversion {##2}% + \def \fileinfo {##3}% + }% + \edef \@tempa {\csname ver@#1\endcsname}% + \expandafter \@tempb \@tempa \relax ? ? \relax \relax +} +\makeatother + \newenvironment*{texdescription}{% \list{}{% - \labelwidth\z@ - \itemindent-\leftmargin - \itemsep = 0pt - \def \makelabel ##1{\hspace{\labelsep}\normalfont\tex{##1}}% + \setlength{\labelwidth}{0pt}% + \setlength{\itemindent}{-\leftmargin}% + \setlength{\itemsep}{0pt}% + \renewcommand*{\makelabel}[1]% + {\hspace{\labelsep}\normalfont\tex{\texmonospaces ##1}}% }% }{% \endlist } -\makeatother \newcommand*{\pack}{\textsf} \newcommand*{\true}{\emph{true}} \newcommand*{\false}{\emph{false}} -\newtest \sillytest [2]{% +\newtest \condition [2]{% \cnttest{(#1)*(#2)}>{100}% \AND \cnttest{((#1)+(#2))*2}<{60}% } -\texsetup {% - meta-left-char = {\textlangle}, - meta-right-char = {\textrangle} -} - +\getfileinfo{xifthen.sty} \title {The \pack{xifthen} package} -\author {Josselin Noirel} +\author {Josselin Noirel\footnote{This document corresponds to version + \fileversion\ (\filedate) of \pack{\filename}.}\\\url{http://www.jnoirel.fr/}} \begin{document} \maketitle \begin{abstract} - This package implements new commands to go within the first argument of - \cmd{ifthenelse} to test whether a string is void or not, if a command - is defined or equivalent to another. It includes also the possibility - to make use of the complex expressions introduced by the - package~\pack{calc}, together with the ability of defining new commands - to handle complex tests. This package requires the \eTeX{} features. + This package implements new commands that can be used within the + first argument of \pack{ifthen}'s \cmd{ifthenelse} to test whether a + string is void or not, if a command is defined or equivalent to + another. It includes also the possibility to make use of the + complex expressions introduced by the package~\pack{calc}, together + with the ability of defining new commands to handle complex tests. + This package requires the \eTeX{} features. \end{abstract} -\section{General syntax} +\tableofcontents + +\section{What's new} + +\begin{itemize} +% $Date: 2007-04-21 17:08:15 +0200 (Sat, 21 Apr 2007) $ +\item Now \cmd{cnttest} and \cmd{dimtest} accept \tex{<=} and \tex{>=}. +\item I~renamed \cmd{terminateswith} in \cmd{endswith}. +\end{itemize} + +\section{\pack{ifthen}'s interface} + +\subsection{Declaring and setting booleans} + +You can declare boolean (presumably in the preamble of your document) with +% +\begin{texcode} +\cmd[syntax,1]{newboolean}{boolean} +\end{texcode} +% +where \meta{boolean} is a name made up of alphanumeric characters. +For instance, +% +\begin{texcode} +\cmd[1]{newboolean}{appendix} \newline +\cmd[1]{newboolean}{first} +\end{texcode} +% +Then your boolean is ready to be set with +% +\begin{texcode} +\cmd[syntax,2]{setboolean}{boolean}{truth value} +\end{texcode} +% +where \meta{truth value} can be \tex{true} or \tex{false}. + +\subsection{Executing conditional code} The general syntax is inherited of that of the package~\pack{ifthen}: % -\begin{displaytex} - \cmdsyntax[3]{ifthenelse}{test expression}{true code}{false code} -\end{displaytex} +\begin{texcode} + \cmd[syntax,3]{ifthenelse}{test expression}{true code}{false code} +\end{texcode} % Evaluates the \meta{test expression} and executes \meta{true code} if the test turns out to be true and \meta{false code} otherwise. \pack{ifthen} -provides the following tests: +provides the tests explained in the next paragraphs. + +\paragraph{Value of a~boolean} + +You can use the value of a~boolean you declared, or the value of +a~primitive boolean of \TeX\footnote{The primitive booleans include: + \tex{mmode} (Are we in math mode?), \tex{hmode} (Are we in + horizontal mode?), \tex{vmode} (Are we in vertical mode?),~etc.} % -\begin{texdescription} -\item [\meta{value $1$} = \meta{value $2$}] -\item [\meta{value $1$} < \meta{value $2$}] -\item [\meta{value $1$} > \meta{value $2$}] - Simple tests on integer comparisons. +\begin{texcode} + \cmd[syntax,1]{boolean}{boolean} +\end{texcode} + +\paragraph{Tests on integers} -\item [{\cmdsyntax[1]{isodd}{number}}] - Is \meta{number} odd? +To test whether an~integer is equal to, strictly less than, or +strictly greater than, you write the expression straightforwardly. +% +\begin{texlist} +\item \meta{value\1} = \meta{value\2} +\item \meta{value\1} < \meta{value\2} +\item \meta{value\1} > \meta{value\2} +\item \cmd[syntax,1]{isodd}{number} +\end{texlist} -\item [\cmd{isundefined}\meta{command}] - Id \meta{command} undefined? +\paragraph{Tests on lengths} -\item [{\cmdsyntax[2]{equal}{string $1$}{string $2$}}] - Are \meta{string $1$} and \meta{string $2$} equivalent (after - expansion)? +There exist similar tests for the lengths, but you need in this case +to surround the whole expression with \cmd{lengthtest}. +% +\begin{texlist} +\item \cmd[1]{lengthtest}{\meta{dimen\1} = \meta{dimen\2}} +\item \cmd[1]{lengthtest}{\meta{dimen\1} < \meta{dimen\2}} +\item \cmd[1]{lengthtest}{\meta{dimen\1} > \meta{dimen\2}} +\end{texlist} -\item [{\cmdsyntax[1]{boolean}{boolean}}] - Does the boolean \meta{boolean} hold the value \true{} or \false{}? +\paragraph{Tests on commands} + +You can test if a command is undefined\footnote{This test differs from + \cmd{@ifundefined} in that it takes a~real command---and not + a~command name---as argument, and also in that command which is let + equal to \cmd{relax} is not considered undefined.}. +% +\begin{texcode} +\cmd{isundefined} \meta{command} +\end{texcode} -\item [{\cmd[1]{lengthtest}{\meta{dimen $1$} = \meta{dimen $2$}}}] -\item [{\cmd[1]{lengthtest}{\meta{dimen $1$} < \meta{dimen $2$}}}] -\item [{\cmd[1]{lengthtest}{\meta{dimen $1$} > \meta{dimen $2$}}}] - Simple dimension comparisons. +\paragraph{Tests on character strings} -\item [\cmd{(}\dots\cmd{)}] - Parenthesis. +You want to know whether two character strings are equal? Use: +% +\begin{texcode} +\cmd[syntax,2]{equal}{string\1}{string\2} +\end{texcode} +% +Remark that the two arguments are fully expanded. In other words, it +is the result of the expansion of the macros that is compared. This +behaviour also entails a~moving argument and you should protect +fragile command to avoid bizarre errors.\footnote{Practically, the + fact that the content is expanded, means that if the macro \cmd{bar} + is defined as \cmd[1]{baz}{o}, and the command \cmd{baz} is defined + as \tex{f\#1\#1}, then \cmd[2]{equal}{\cmd{bar}}{foo} turns out to + be true, because \cmd{bar} eventually leads to \tex{foo}. This is + usually the wanted behaviour.} -\item [\cmd{AND}] -\item [\cmd{OR}] -\item [\cmd{NOT}] - Conjunction, disjunction, negation. -\end{texdescription} +\paragraph{Building more elaborated expressions} + +You can build more sophisticated expressing using the \cmd{AND} +(conjunction), \cmd{OR} (disjunction), and \cmd{NOT} (negation) +operators\footnote{Lowercase versions of these commands also exist but + we advise the user to stick to the uppercase ones because \cmd{or} + is part of \TeX's syntax.}. +% +\begin{texlist} +\item \meta{expression\1} \cmd{AND} \meta{expression\2} +\item \meta{expression\1} \cmd{OR} \ \meta{expression\2} +\item \cmd{NOT} \meta{expression} +\end{texlist} +% +The evaluation is lazy, meaning that if you write +% +\begin{texcode} +\meta{expression\1} \cmd{AND} \meta{expression\2} +\end{texcode} +% +then \meta{expression\2} won't be evaluated if \meta{expression\1} is +true\footnote{The evil is in the details: \pack{ifthen} works by + reading its argument twice. The tests are evaluated on the second + pass, but and expansion is performed on the first one, regardless of + the truth value. So that, quite surprisingly, the following test + fails: + % + \begin{texcode} + \cmd{NOT} \cmd[1]{isundefined}{\cmd{foo}} \cmd{AND} + \cmd[2]{equal}{\cmd{foo}}{\<string\>} + \end{texcode} +}. + +There is not precedence rules: the argument is read from left to right +and \cmd{NOT} applies to the very next test. When the precedence must +be changed you can use the parentheses: +% +\begin{texcode} +\cmd{(}\meta{expression}\cmd{)} +\end{texcode} \section{New tests} -\begin{displaytex} - \cmdsyntax[1]{isnamedefined}{command name} -\end{displaytex} +After this brief review of \pack{ifthen}'s principles, we introduce +the new tests provided by \pack{xifthen}. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +\paragraph{Tests on integers} + +One of the drawback of \TeX's tests and of \cmd{ifthen}'s as well, is +the impossibility to use \pack{calc}'s syntax in it. The +\cmd{numexpr} primitive of \eTeX\ somehow allows to overcome this +difficulty but it is not well documented and normal users are +certainly more familiar with the capabilities offered by \pack{calc}. +The \pack{xifthen} package allows to use \pack{calc}-valid expressions +via the new test \cmd{cnttest}. The syntax is as follows: +% +\begin{texcode} + \cmd{cnttest}\marg{counter expression\1}\marg{comparison}% + \marg{counter expression\2} +\end{texcode} % -Returns \true{} if the command \cmd{\meta{command name}} is defined. +It evaluates the two counter expressions, compares them, and returns +the value of the test. The comparison can be one of the following +sequences \tex{<}, \tex{>}, \tex{=}, \tex{<=},~or~\tex{>=}. -\begin{displaytex} - \cmdsyntax[1]{isempty}{content} -\end{displaytex} +\paragraph{Tests on lengths} + +The similar test has been designed for the lengths and dimensions: % -Returns \true{} is \meta{content} is empty (in the sense used by -\pack{ifmtarg} which is used internally). It is essentially equivalent to -\tex{\cmd[2]{equal}{\meta{content}}{}} except that the argument of -\cmd{isempty} isn't expanded and therefore isn't affected by fragile -commands. +\begin{texcode} + \cmd{dimtest}\marg{dimen expression\1}\marg{comparison}% + \marg{dimen expression\2} +\end{texcode} +% +It evaluates the two dimension expressions, compares them, and returns +the value of the test. The comparison can be one of the following +sequences \tex{<}, \tex{>}, \tex{=}, \tex{<=},~or~\tex{>=}. + +\paragraph{Tests on commands} -\begin{displaytex} - \cmdsyntax[2]{isequivalentto}{command~$1$}{command~$2$} -\end{displaytex} +We define a~companion of \cmd{isundefined} that uses a~command name +rather than a~command\footnote{If you are stuck with the distinction + between `command' and `command name', let me explain it further with + an example: the command name of the command \cmd{foo} is \tex{foo}. + This is sometimes more convenient to use the command name than the + name. Still, this functionality is probably intended more for + experienced programmers who want to use the niceties of + \pack{ifthen} and \pack{xifthen}.}. % -Corresponds to the \cmd{ifx} test: it returns \true{} when the two +\begin{texcode} + \cmd[1,syntax]{isnamedefined}{command name} +\end{texcode} +% +Returns \true\ if the command \cmd{\meta{command name}} is defined\footnote{% + Uses \tex{\cmd{ifcsname}\dots\allowbreak\cmd{endcsname}} internally + and not \cmd{@ifundefined}.}. + +Sometimes, you need to compare two macros \cmd{foo} and \cmd{bar} and +test whether they are actually the same macro. +% +\begin{texcode} + \cmd[syntax,2]{isequivalentto}{command\1}{command\2} +\end{texcode} +% +Corresponds to the \cmd{ifx} test: it returns \true\ when the two commands are exactly equivalent (same definition, same number of -arguments, etc., otherwise \false{} is returned. +arguments, same prefixes, etc., otherwise \false\ is returned). + +\paragraph{Tests on character strings} + +Very often, we see people using \cmd[2]{equal}{\#1}{} in their command +definitions (for instance, to test whether an optional argument had +been passed to their macro). A~more efficient test can be used: +% +\begin{texcode} + \cmd[syntax,1]{isempty}{content} +\end{texcode} +% +Returns \true\ if \meta{content} is empty. It is essentially equivalent to +\tex{\cmd[2]{equal}{\meta{content}}{}} except that the argument of +\cmd{isempty} isn't expanded and therefore isn't affected by fragile +commands\footnote{Internally, it uses \cmd{unexpanded} and \pack{ifmtarg}.}. -\begin{displaytex} - \cmd{cnttest}\marg{counter expression $1$}\meta{comparison}% - \marg{counter expression $2$} -\end{displaytex} +It is possible to test whether a~substring appears within another +string\footnote{Uses \cmd{in@} and \cmd{ifin@} internally.}. % -Compares the two counter expressions (having the usual syntax of the -package \pack{calc}) and returns the value of the test. The comparison -can be one of the following characters \tex{<}, \tex{>},~and~\tex{=}. +\begin{texcode} + \cmd[syntax,2]{isin}{substring}{string} +\end{texcode} -\begin{displaytex} - \cmd{dimtest}\marg{dimen expression $1$}\meta{comparison}% - \marg{dimen expression $2$} -\end{displaytex} +Sometimes, you need to check whether a~string ends with a particular +substring. This can be achieved using\footnote{For compatibility + reasons, there exist a~command unfortunately called + \cmd{terminateswith} that performs the same test but it is + deprecated.}: % -Compares the two dimension expressions (having the usual syntax of the -package \pack{calc}) and returns the value of the test. The comparison -can be one of the following characters \tex{<}, \tex{>},~and~\tex{=}. +\begin{texcode} + \cmd[syntax,2]{endswith}{string}{substring} +\end{texcode} -\section{Defining new complex test commands} +\paragraph{Building more elaborated expressions} +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -\begin{displaytex} - \cmdsyntax[3]{newtest}{command}[$n$]{test expression} -\end{displaytex} +It is then possible to create new tests with: % -Defines a command named \meta{command} taking $n$~arguments (no optional -argument is allowed) consisting of the test as specified by \meta{test - expression} that can be used in the argument of \cmd{ifthenelse}. For -instance, if we want to test whether a rectangle having dimensions -$l$~and~$L$ meets the two following conditions: $S = l \times L > 100$ -and~$P = 2 (l +\nobreak L) < 60$: +\begin{texcode} + \cmd[syntax,3]{newtest}{command}[$n$]{test expression} +\end{texcode} % -\begin{displaytex} -\cmd{newtest}\{\cmd{sillytest}\}[2]\{\%\newline +Surprisingly, a~simple \cmd{newcommand} would not work. The +\cmd{newtest} macro defines a command \meta{command} taking +$n$~arguments (no optional argument is allowed\footnote{No optional + argument is allowed because the macro needs to be expanded in the + first pass and that optional arguments avoid that.} consisting of +the test as specified by \meta{test expression} that can be used in +the argument of \cmd{ifthenelse}. + +\section{Examples} + +Let's illustrate the most important features of \pack{xifthen} with +the following problem: if we want to test whether a rectangle having +dimensions $l$~and~$L$ meets the two following conditions: $S = l +\times\nobreak L > 100$ and~$P = 2 (l +\nobreak L) < 60$\footnote{Note + that, because within the arguments of \cmd{cnttest} the \pack{calc} + is used, you must use real parentheses \tex{(}~and~\tex{)} and not + \cmd{(}~and~\cmd{)}.}: +% +\begin{texcode} +\cmd{newtest}\{\cmd{condition}\}[2]\{\%\newline \ \ \cmd{cnttest}\{(\#1)*(\#2)\}>\{100\}\%\newline \ \ \cmd{AND}\newline \ \ \cmd{cnttest}\{((\#1)+(\#2))*2\}<\{60\}\%\newline \} -\end{displaytex} +\end{texcode} % -Then \tex{\cmd{ifthenelse}\{\cmd{sillytest}\{14\}\{7\}\}\{TRUE\}\{FALSE\}} -returns \ifthenelse{\sillytest{14}{7}}{TRUE}{FALSE} because $14\times 7 = +Then \tex{\cmd{ifthenelse}\{\cmd{condition}\{14\}\{7\}\}\{TRUE\}\{FALSE\}} +returns \ifthenelse{\condition{14}{7}}{TRUE}{FALSE} because $14\times 7 = 98$ and $2\times (14 +\nobreak 7) = 42$, while -\tex{\cmd{ifthenelse}\{\cmd{sillytest}\{11\}\{11\}\}\{TRUE\}\allowbreak - \{FALSE\}} returns \ifthenelse{\sillytest{11}{11}}{TRUE}{FALSE} because +\tex{\cmd{ifthenelse}\{\cmd{condition}\{11\}\{11\}\}\{TRUE\}\allowbreak + \{FALSE\}} returns \ifthenelse{\condition{11}{11}}{TRUE}{FALSE} because $11 \times 11 = 121$ and $2\times (11 +\nobreak 11) = 44$. +\bigbreak + +Now a~list of typical uses of \pack{xifthen}'s capabilities: + +\small +\begin{list}{}{\setlength{\leftmargin}{0pt}% + \setlength{\rightmargin}{-\oddsidemargin}% + \setlength{\partopsep}{0pt}% + \setlength{\topsep}{\medskipamount}% + \setlength{\parsep}{0pt}}% +\item \newcommand*{\TRUE}{% + \ifthenelse{\equal{\csname f@family\endcsname}{lmtt}}{true}% + {\makebox[\widthof{false}][l]{\bfseries true}}% + } + \newcommand*{\FALSE}{false} + \newcommand*{\pt}{\ifmmode \,\mathrm{pt}\else pt\fi} + +$4 - 1< 4$: \ifthenelse{\cnttest{4 - 1}{<}{4}}{\TRUE}{\FALSE}\quad +$4< 4$: \ifthenelse{\cnttest{4}{<}{4}}{\TRUE}{\FALSE}\quad +$4 + 1< 4$: \ifthenelse{\cnttest{4 + 1}{<}{4}}{\TRUE}{\FALSE} + +$4 - 1\leq 4$: \ifthenelse{\cnttest{4 - 1}{<=}{4}}{\TRUE}{\FALSE}\quad +$4\leq 4$: \ifthenelse{\cnttest{4}{<=}{4}}{\TRUE}{\FALSE}\quad +$4 + 1\leq 4$: \ifthenelse{\cnttest{4 + 1}{<=}{4}}{\TRUE}{\FALSE} + +$4 - 1= 4$: \ifthenelse{\cnttest{4 - 1}{=}{4}}{\TRUE}{\FALSE}\quad +$4= 4$: \ifthenelse{\cnttest{4}{=}{4}}{\TRUE}{\FALSE}\quad +$4 + 1= 4$: \ifthenelse{\cnttest{4 + 1}{=}{4}}{\TRUE}{\FALSE} + +$4 - 1\geq 4$: \ifthenelse{\cnttest{4 - 1}{>=}{4}}{\TRUE}{\FALSE}\quad +$4\geq 4$: \ifthenelse{\cnttest{4}{>=}{4}}{\TRUE}{\FALSE}\quad +$4 + 1\geq 4$: \ifthenelse{\cnttest{4 + 1}{>=}{4}}{\TRUE}{\FALSE} + +$4 - 1> 4$: \ifthenelse{\cnttest{4 - 1}{>}{4}}{\TRUE}{\FALSE}\quad +$4> 4$: \ifthenelse{\cnttest{4}{>}{4}}{\TRUE}{\FALSE}\quad +$4 + 1> 4$: \ifthenelse{\cnttest{4 + 1}{>}{4}}{\TRUE}{\FALSE} + +\medskip + +$4\pt - 1\pt< 4\pt$: \ifthenelse{\dimtest{4\pt - 1\pt}{<}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt< 4\pt$: \ifthenelse{\dimtest{4\pt}{<}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt + 1\pt< 4\pt$: \ifthenelse{\dimtest{4\pt + 1\pt}{<}{4\pt}}{\TRUE}{\FALSE} + +$4\pt - 1\pt\leq 4\pt$: \ifthenelse{\dimtest{4\pt - 1\pt}{<=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt\leq 4\pt$: \ifthenelse{\dimtest{4\pt}{<=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt + 1\pt\leq 4\pt$: \ifthenelse{\dimtest{4\pt + 1\pt}{<=}{4\pt}}{\TRUE}{\FALSE} + +$4\pt - 1\pt= 4\pt$: \ifthenelse{\dimtest{4\pt - 1\pt}{=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt= 4\pt$: \ifthenelse{\dimtest{4\pt}{=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt + 1\pt= 4\pt$: \ifthenelse{\dimtest{4\pt + 1\pt}{=}{4\pt}}{\TRUE}{\FALSE} + +$4\pt - 1\pt\geq 4\pt$: \ifthenelse{\dimtest{4\pt - 1\pt}{>=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt\geq 4\pt$: \ifthenelse{\dimtest{4\pt}{>=}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt + 1\pt\geq 4\pt$: \ifthenelse{\dimtest{4\pt + 1\pt}{>=}{4\pt}}{\TRUE}{\FALSE} + +$4\pt - 1\pt> 4\pt$: \ifthenelse{\dimtest{4\pt - 1\pt}{>}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt> 4\pt$: \ifthenelse{\dimtest{4\pt}{>}{4\pt}}{\TRUE}{\FALSE}\quad +$4\pt + 1\pt> 4\pt$: \ifthenelse{\dimtest{4\pt + 1\pt}{>}{4\pt}}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{isempty}\{\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isempty{}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{isempty}\{ \}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isempty{ }}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{isempty}\{ foo \}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isempty{ foo }}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{endswith}\{foo.\}\{.\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\endswith{foo.}{.}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{endswith}\{foo!\}\{.\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\endswith{foo!}{.}}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{isin}\{foo\}\{foobar\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isin{foo}{foobar}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{isin}\{Foo\}\{foobar\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isin{Foo}{foobar}}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{cnttest}\{10 * 10 + 1\}>\{100\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\cnttest{10 * 10 + 1}>{100}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{cnttest}\{10 * 10 + 1\}>\{100 * 100\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\cnttest{10 * 10 + 1}>{100 * 100}}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{isequivalentto}\{\cmd{usepackage}\}\{\cmd{RequirePackage}\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isequivalentto{\usepackage}{\RequirePackage}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{isequivalentto}\{\cmd{usepackage}\}\{\cmd{textit}\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isequivalentto{\usepackage}{\textit}}{\TRUE}{\FALSE} + +\medskip + +\tex{\cmd{ifthenelse}\{\cmd{isnamedefined}\{@foo\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isnamedefined{@foo}}{\TRUE}{\FALSE} + +\tex{\cmd{ifthenelse}\{\cmd{isnamedefined}\{@for\}\}\{\TRUE\}\{\FALSE\}} +\ifthenelse{\isnamedefined{@for}}{\TRUE}{\FALSE} +\end{list} + \end{document} |